Termux - a terminal emulator application for Android OS extendible by variety of packages.

A browser automation framework and ecosystem.

Very spicy additions to the Java programming language.

Java interface to OpenCV, FFmpeg, and more

[DEPRECATED] Action bar implementation which uses the native action bar on Android 4.0+ and a custom implementation on pre-4.0 through a single API and theme.

Haven is for people who need a way to protect their personal spaces and possessions without compromising their own privacy, through an Android app and on-device sensors

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID…

Fully featured, open source, privacy friendly email app for Android

An authorization library that supports access control models like ACL, RBAC, ABAC in Java

Flute Music Player - First Open Source Flutter based material design music player with audio plugin to play local music files.